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8124046 |
Alkali metal iodide salt solution and method for producing the same
A method for producing an alkali metal iodide salt solution including combusting a liquid for combustion so as to combust a combustible component of the liquid for combustion; and subsequently...
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7638109 |
Production of sodium sesquicarbonate and sodium carbonate monohydrate
A process for the production and recovery of crystalline sodium sesquicarbonate and of crystalline sodium carbonate monohydrate from aqueous liquors containing sodium carbonate and sodium...
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7507388 |
Process for production of dense soda, light soda, sodium bicarbonate and sodium silicate from solutions containing bicarbonate
A process related to sodium chemicals production, including the processing of bicarbonate containing solutions obtained by solution mining of trona, nahcolite or wegscheiderite reserves and the...
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7473407 |
Magnetic separation process for trona
A process for the beneficiation of trona includes supplying a trona feedstream that is crushed and dried. The trona is then separated into a first size fraction and a second size fraction....
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7255841 |
Sodium bicarbonate production method
A method of producing sodium bicarbonate having a high degree of purity and obtaining a net reduction in effluent waste water, as compared to prior processes, when starting from trona ore is...
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7005076 |
Caustic solution treatment process
A method for treating a spent caustic solution having a pH greater than about 10.5 includes the steps of (a) lowering the pH of the caustic solution into the range of between about 10 to 10.5 to...
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6576206 |
Bicarbonate conversion in a carbonate monohydrate process
A method for converting sodium bicarbonate in a sodium carbonate monohydrate crystallization process to maintain a mother liquor composition in a sodium carbonate monohydrate crystallizer below the...
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6475458 |
Method for formulating food grade sodium bicarbonate
There is disclosed a method for formulating food grade sodium bicarbonate by purification of a sodium bicarbonate liquor where an initial saturated feedstock of sodium bicarbonate which contains...
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6458333 |
Process for recycling alkali metal fluorides and/or difluorides
The invention relates to a process for recovering alkali metal fluorides and/or difluorides from waste mixtures containing alkali metal chlorides and/or alkali metal fluorides and/or difluorides...
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6334989 |
Production of water-free soda
A process is presented in which anhydrous soda is crystallized and worked up to produce anhydrous soda crystals with a bulk density from 1300 to 1600 kg/m3. The process is characterized in that a...
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5972506 |
Intercalation compounds, method for preparing them and use thereof, particularly in pyrotechnics
An intercalation compound of general formula Nax K1-X Zy, wherein Z is a carbon or a polymer with a cyclic, particularly aromatic unit, as base unit; 0
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5900112 |
Method of reducing the viscosity of a black liquor using thiocyanate salt
A method of recycling sodium-based salts used for digesting wood in a digester during the manufacture of pulp and paper. The method comprises collecting a black liquor from the digester,...
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5609838 |
Equilibrium production of sodium carbonate from sodium bicarbonate
A process for producing sodium carbonate and other sodium-based chemicals from an aqueous solution containing sodium bicarbonate by contacting an aqueous solution of a bicarbonate-containing...
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5508012 |
Methods for recovering sodium sulfides from a sulfur scavenging reaction
A method is provided for the regeneration of a scavenging compound that has been reacted with hydrogen sulfide. Regeneration is accomplished through the use of calcium oxides and sodium hydroxide....
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5198145 |
Dry detergent compositions
Dry-blended detergent formulations are prepared by absorbing liquid surfactant on absorptive soda ash derived from the dehydration of sodium carbonate decahydrate.
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4670232 |
Recovery of amines from by-product chloride salts
A method is disclosed for separating alkyleneamines from a mixture of by-product alkali or alkaline earth metal chloride salt and alkyleneamines comprising the sequenced combination of the steps...
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4451439 |
Process for the purification of solutions containing a sodium or potassium carbonate, sulphate, and possibly hydroxide, and at least one of the metals vanadium, uranium and molybdenum
A process for the purification of solutions containing sodium or potassium carbonate, sulphate, hydroxide or hydrogen carbonate, and mainly at least one of the metals belonging to the group formed...
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4430271 |
Energy transfer
This invention relates to a process for neutralizing detergent acid mixes containing unreacted sulfating agent such as sulfuric acid with an alkaline component such as sodium hydroxide. The...
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4395356 |
Method for removing catalyst residues from solutions of poly-1-butene
A process for removing catalyst residues from poly-1-butene which is disclosed which comprises contacting an organic phase containing the poly-1-butene dissolved in an inert hydrocarbon solvent...
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4365975 |
Use of electromagnetic radiation to recover alkali metal constituents from coal conversion residues
In a coal gasification operation or similar conversion process carried out in the presence of an alkali metal-containing catalyst wherein particles containing alkali metal residues are produced,...
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4350599 |
Process for treatment of caustic waste liquors
An improvement in the wet oxidation of caustic waste liquors wherein carbon dioxide produced in the wet oxidation is recycled to raw caustic waste to neutralize the latter, thereby reducing the...
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4323436 |
Purification of aqueous solution of potassium chloride
A purification of an aqueous solution of potassium chloride which is used for producing potassium hydroxide by an electrolysisin an electrolytic cell using a cation exchange membrane is carried out...
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4313788 |
Process for reducing oxygen consumption in black liquor oxidation
High heat recovery and minimized oxygen requirement for oxidation of sulfur compounds in black liquor is obtained by integrating the oxidation into the multiple effect evaporation system of the...
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4311851 |
Preparation of carboxylic acid esters with BF3 -alcohol complex catalyst
The invention includes a process wherein an olefin is carbonylated with carbon monoxide to form carboxylic acid esters in the presence of a catalyst complex of one mole of BF3 and one mole of...
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4239589 |
Process for oxidation of black liquor
High recovery of useful energy from the heat of reaction in the oxidation of black liquor is obtained by integrating the oxidation into the multiple effect evaporation system of the pulp mill...
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4193771 |
Alkali metal recovery from carbonaceous material conversion process
In a coal gasification operation or similar conversion process carried out in the presence of an alkali metal-containing catalyst wherein solid particles containing alkali metal residues are...
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4193772 |
Process for carbonaceous material conversion and recovery of alkali metal catalyst constituents held by ion exchange sites in conversion residue
In a coal gasification operation or similar conversion process carried out in the presence of an alkali metal-containing catalyst wherein solid particles containing alkali metal residues are...
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4145396 |
Treatment of organic waste
An organic waste containing at least one element selected from the group consisting of strontium, cesium, iodine and ruthenium is treated to achieve a substantial reduction in the volume of the...
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4101286 |
Bubble forming device having no moving parts
A bubble-forming device for gas-liquid contact which can be advantageously used for air oxidation in a liquid phase comprising a housing divided into upper and lower chambers by a partition having...
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4057512 |
Alkali metal catalyst recovery system
In a coal gasification operation or similar process carried out in the presence of an alkali metal-containing catalyst wherein spent solids containing ash and alkali metal catalyst residues are...
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4039427 |
Process for retorting oil shale
A process for the recovery of oil from oil-bearing shale and for employing the oil-depleted shale as a combustible heat source. The oil-bearing shale is charged on a traveling grate to form a...
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3998607 |
Alkali metal catalyst recovery process
A water-soluble alkali metal compound or other soluble constituent is recovered from a mixture of solid particles of different densities and the solid particles are simultaneously separated into...
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3997300 |
Black liquor oxidation apparatus
Gas-liquid contact reaction efficiency in a two stage heavy black liquor oxidation process is improved by co-current contact in the first stage and countercurrent contact in the second stage or...
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3988198 |
Method for treating hemi caustic effluents
Spent hemi caustic effluents from cold caustic extraction of cellulosic pulps are rendered utilizable as a source of sodium hydroxide for pulp processing by heating the effluents for a period of...
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3962403 |
Process for separation of nahcolite from oil shale
Nahcolite-bearing oil shale ore is heated to produce a distinct color change in the nahcolite, differentiating the nahcolite from the host oil shale for optical sorting, and such sorting is then...
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3928531 |
Black liquor oxidation process
Gas-liquid contact reaction efficiency in a two stage heavy black liquor oxidation process is improved by co-current contact in the first stage and countercurrent contact in the second stage or...
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3888967 |
Method and apparatus for oxidizing sulphide-containing aqueous solutions
In oxidizing sulphides contained in alkaline aqueous solutions by an oxygen-containing gas, the unwanted production of hydrogen sulphide is prevented by effecting the oxidation in the presence of...
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3873414 |
Process for the treatment of black liquor of cellulosic pulp wherein oxidation is performed both before and after black liquor concentration
A process for the treatment of black liquor in which in a first oxidation stage there is blown into dilute black liquor a quantity of oxygen ranging from 0.5 to 1 times that theoretically necessary...
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3870780 |
Purification of sodium carbonate
A method of treating an aqueous solution of sodium carbonate containing soluble silicates and suspended insoluble matter by digesting the solution at a temperature within the range of about 185° ...
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3869538 |
PROCESS FOR PRODUCING SODIUM CARBONATE FROM TRONA
Crushed crude trona is calcined to crude sodium carbonate in a fluidized-bed reactor at a temperature of 125°-225°C, preferably at a temperature of 125°-175°C. The fluidized-bed reactor both cal...
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3700766 |
METHOD FOR PRODUCING SOLUTIONS OF HIGH ALUMINA CONCENTRATION BY ALKALINE EXTRACTION OF ALUMINUM-CONTAINING OIL SHALE
Aluminum values are leached from retorted oil shale with 0.5N to 1N sodium hydroxide solution present in sufficient quantity such that the mol ratio between sodium in the solution and aluminum in...
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3549314 |
OXIDATION OF BLACK LIQUOR
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3549484 |
METHOD AND APPARATUS FOR THE RECOVERY OF SULFITE WASTE LIQUORS
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3527692 |
SIMULTANEOUS PIPELINE TRANSPORTATION AND RECOVERY OF OIL FROM OIL SHALE
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3523864 |
PAPER PULPING CHEMICAL RECOVERY SYSTEM
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3516787 |
RECOVERY OF OIL AND ALUMINUM FROM OIL SHALE
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3511601 |
PROCESS FOR DENSIFYING RICE HULLS
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3796794 |
USE OF CARBOXYLIC ACIDS AS CRYSTAL GROWTH MODIFIERS FOR SODIUM CARBONATE MONOHYDRATE
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3767763 |
SEPARATION OF SODIUM COMPOUNDS
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3676064 |
METHODS FOR THE TREATMENT OF SPENT SULFITE PULPING LIQUORS AND THE RECOVERY OF CHEMICAL PULPING VALUES THEREFROM
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